The incident occurred around 11:15 p.m., when Egan and Officer Nicole Berry stopped to check suspicious behavior at East Coast Gas, a service station/car wash at Broadway and Newton Avenue that had closed for the night, Wysocki said.

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Police are seeking an ATV driver who struck two police officers at this city gas station Saturday night.(Photo: Jim Walsh/Staff photographer)

The officers, on a plainclothes robbery detail, left their vehicle and ordered the suspect to stop, but he "immediately" drove his ATV into their unmarked vehicle, police said.

He struck a passenger-side door that in turn hit Berry, police said.

Wysocki said Egan then attempted to engage the suspect.

"He sped up the motorcycle and literally ran the officer over," said Wysocki. "The officer was knocked backwards, hit his head, was knocked unconscious and … the ATV went over him."

Egan suffered a "severe" concussion and bruised ribs, Wysocki said.

Both officers were treated and released at Cooper University Hospital, Wysocki said.

The suspect fled the area on a black, four-wheel, "racing style" ATV with a square body style, according to police. It had a front headlight and a rectangular rear taillight.